Feed l



(No Model.)

P. L. MGGAHAN.

PIPE COUPLING.

Elm-386,129. Patented Feb. 16, 1886.

\A/I HEEEE Q/ vIPR/ J- Q/kgfdh z (7 114, 96 244 Mala UNITED STATES ATENTFRED L. MOGAHAN, OF INDIANAPOLTS, INDIANA PIPE-COUPLING.

SPECIFICATION forming part of Letters Patent No. 336,129, dated Fbrumy16, 1885 Application filed May 16, 185 4.

To all whomit may concern.-

Be it known that I, FRED L. MOGAHAN, a citizen of the United States,residing at Indianapolis, county of Marion, and State of In diana, haveinvented a new and useful Improved Pipe-Coupling, of which the followingis a specification.

Myinvention relates to an improved means for coupling together the endsof pipe.

The objects of my improvement are to pro vide a flexible expansion-jointwhich shall be more secure and durable than those made heretofore, andin which the expansion of the pi pcs shall operate to tighten thepacking around the joint, all as hereinafter fully described.

The accompanying drawing illustrates my invention.

The figure represents a longitudinal section of my improved coupling.

ais a. short tube having a flange, 1), near one end, and the oppositeend threaded to receive a steam-pipe.

c is a tube having a flange, d, about midway its length, threaded at oneend, and having its opposite end adapted to slide within tube a.

e is a stuffing-box to prevent the escape of steam between tubes a ande.

f is a spiral spring placed between flange (Z and the gland ofstuliing-box e.

For the purpose of allowing an independent rotary movement of tubes (1.and 0- without lwisting spring j", the ends of saidspring are secured,respectively, to washers g and 72.

Serial No. 131,7l6. (No model.)

i is a cylindrical case formed in two parts, each having a stufiing-box,j and 70, which fit the tubes c and c, respective] y. The two parts areunited by screwing one into the other at Z.

In operation one of the two pipes to be coupled is screwed into tube aand the other into tube 0. Etch of said tubes being free to turnindependently in the case 1', right-hand threads may be used on bothpipes. The gland m of smiling-box a is held closely to its place byspringf: mission of steam, tube 0 slides into tube a, and both slidetoward each otherin case 2'. Such movement compresses spring f, andthereby tightens the packing in stuifingbox e. If any steam shouldescape between pipes a and c, it IS prevented from escaping from case iby the st utting-boxes j and It.

I claim as my invention- In a pipe-coupling, tubesa and 0, joined bysliding one within the other, stutling-box e, closing said joint, spiralspringf, arranged to abutngainsl; the gland of said stufling-box andagainst flange (2 on tube 0, whereby said is compressed and thestutfingbox tightened by the sliding of the tubes together, and case i,inelosing said striding-box and spring, all combined and arranged toco-operate substantially as and for the purpose specified.

- FRED L. MCGAHAN.

\Vi tnesses:

H. 1. H001), A. M. H001).

- As the pipesexpand on rue-ad spring-

